One example would be Elicina Snail Cream. Excellent product, look into it if you haven't heard about it
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if it comes from a snail, its not vegan!
I agree with Tombi and think that there is a growing market in the 'natural products/eco/green/sustainable living' sector. Just look at the number of eco/sustainable living type ferias that have been happening, like the recent Providencia one. And Ecoferia La Reina is packed on Saturdays!
As a label reading vegetarian, I think you will be fine being vegan here. Difficult areas will be the amount of sugar and milk powder in any pre packaged food items and the ol' favourite, stock cubes [i bring my own in from o/s and highly recommend you do too].
There are other stores with organic lines too, inc in Providencia El Arbol, Planta Maestra and Trigal del Sol and Tierra Viva in Nunoa. Tostadurias stock great dry goods and some have organic lines. Unfortunately, a lot of the packaged organic stuff coming in is from US so pricey, and with high food miles IMO. I have noted more organic stuff coming in from Brazil too inc soy milk and fair trade coffee.
good online references abound
http://www.happycow.net/south_america/chile/santiago/http://ciudadanoresponsable.cl/http://www.veoverde.com/As for your idea to do cooking classes, I think this could be a good idea. Even from within my own contacts and friends, many have commented the same about my cooking, just because it is vegetarian. I don't think you'd have to especially go to Vitacura to make it work tho'.....